GIRTH

girth. Girth, [g hard] n. the compass made by a string, a girt

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Girth (gẽrth), n. [[Icel. gjörð girdle, or gerð girth; akin to Goth. gaírda girdle. See Gird to girt, and cf. Girdle, n.]] 1. 1. A band or strap which encircles the body; especially, one by which a saddle is fastened upon the back of a horse.
2. 2. The measure round the body, as at the waist or belly; the circumference of anything.
He's a lu sty, jolly fellow, that lives well, at least three yards in the girth. Addison. 3. 3. A small horizontal brace or girder.